Security breach of MacBook and iPhone 11 -

People get malware installed all the time. Usually by a user action that has fooled them into opening a malware infected email, visiting a "bad" website, using an infected flash drive and etc. Unfortunately it's not all that uncommon. You can scan for malware with MalwareBytes and DetectX Swift apps.

There are no Mac viruses in the wild, but an unwary user can allow infection of the device with malware.

If it were me, I'd immediately change all my passwords and be especially wary of unknown email senders and nefarious websites and not use anybody's USB flash drives but my own. You just have to be careful of actions that can potentially open you to being used by others.

It sounds like you had an attempted security breach which happens when somebody gets your credentials. It appears you dodged a bullet. It's a good thing you talked with your bank, but somebody has you in their sights, or at least did at one time. Maybe you were in some batch of data that was stolen in one of the recent attacks. In that case, it was nothing you did. The institution was at fault with insufficient security. And that. takes you back to changing all your passwords